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Descartes (French pronunciation: ⓘ) is a large village and commune in the Indre-et-Loire department in central France.It is approximately 29 kilometers east of Richelieu and about 48 kilometers east of Loudun, on the banks of the Creuse River, near the border of the French department of Vienne, and the border of the region between Centre-Val de Loire and Nouvelle-Aquitaine.
Martin Luther OSA ( / ˈluːθər /; [1] German: [ˈmaʁtiːn ˈlʊtɐ] ⓘ; 10 November 1483 [2] – 18 February 1546) was a German priest, theologian, author, hymnwriter, professor, and Augustinian friar. [3] Luther was the seminal figure of the Protestant Reformation, and his theological beliefs form the basis of Lutheranism.
Definition. Let P and Q be fixed points in the plane, and let d (P, S) and d (Q, S) denote the Euclidean distances from these points to a third variable point S. Let m and a be arbitrary real numbers. Then the Cartesian oval is the locus of points S satisfying d (P, S) + m d (Q, S) = a. The two ovals formed by the four equations d (P, S) + m d ...
Service. Descartes at Sebastopol, during the first day's attack by the allied fleet and armies of France and England on 17 October 1854. She took part in the Crimean War, and was used to ferry wounded from Italy. On 17 October 1855, she took part in the Battle of Kinburn . She was eventually broken up in Brest in July 1867.
René Descartes. Principles of Philosophy ( Latin: Principia Philosophiae) is a book by René Descartes. In essence, it is a synthesis of the Discourse on Method and Meditations on First Philosophy. [1] It was written in Latin, published in 1644 and dedicated to Elisabeth of Bohemia, with whom Descartes had a long-standing friendship.
In geometry, Descartes' theorem states that for every four kissing, or mutually tangent, circles, the radii of the circles satisfy a certain quadratic equation. By solving this equation, one can construct a fourth circle tangent to three given, mutually tangent circles. The theorem is named after René Descartes, who stated it in 1643.
Blanche Descartes was a collaborative pseudonym used by the English mathematicians R. Leonard Brooks, Arthur Harold Stone, Cedric Smith, and W. T. Tutte.The four mathematicians met in 1935 as undergraduate students at Trinity College, Cambridge, where they joined the Trinity Mathematical Society and began meeting together to work on mathematical problems.
Descartes number. In number theory, a Descartes number is an odd number which would have been an odd perfect number if one of its composite factors were prime. They are named after René Descartes who observed that the number D = 32⋅72⋅112⋅132⋅22021 = (3⋅1001)2 ⋅ (22⋅1001 − 1) = 198585576189 would be an odd perfect number if ...